Changes in the glycogen levels during exercise and after 1 h of exercise. CON: distilled water with training, SP: silk peptide-treated with training. A, liver; B, white gastrocnemius muscle tissue; and C, red gastrocnemius muscle tissue at rest, after exercise, and recovery in the CON and SP groups. Values are presented as means ± standard deviations (n = 36). * vs. rest, P < 0.01; # vs. rest and after-exercise, P < 0.05; $ vs. recovery in CON, P < 0.001; ¶ vs. after-exercise, P < 0.05.